200832312 秦 t 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種顯示系統，尤其係關於一種用以控制顯示 系統之電源單元的方法。 【先前技術】 近年來，隨著各種電子產品的蓬勃發展，商用與家用的多媒 體系統皆曰益普及。在大部分的多媒體系統中，最重要的硬體就 ⑩ 屬用以呈現影像的顯示設備。因此，如何提升顯示設備的品質'一 直為其設計者高度重視的議題。 '200832312 Qin t IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a display system, and more particularly to a method for controlling a power supply unit of a display system. [Prior Art] In recent years, with the booming of various electronic products, commercial and domestic multimedia systems have been popularized. In most multimedia systems, the most important hardware is the 10 display devices used to render images. Therefore, how to improve the quality of display devices has always been a topic that designers value. '
請參閱圖一，圖一係繪示一典型的顯示系統之方塊圖。該顯 示系統10包含一顯示單元11、一電源轉換器(inverter) 12，以^ 一微處理器13。顯示單元11通常包含一螢幕11A和一發光模組 11B。舉例來說，若螢幕11A為一液晶螢幕，則發光模組11B可 為一冷陰極螢光燈管(cold cathode fluorescent lamp，CCFL)或是發 光二極體(light emitting diode，LED)模組。 X _ 電源轉換器12係用以提供發光模組11B所需之電流。以 CCFL為例，電源轉換器12提供的電流可令CCFL的兩端產生高 電壓，進而激發塗佈於CCFL管壁的螢光粉以產生可見光。 丄如圖一所示，微處理器13提供螢幕11A 一資料信號。舉例 而言/該資料信號可能包含將被顯示於螢幕11A之影像資料。此 外，微處理器13亦提供電源轉換器12 一控制信號，以控制電源 轉換器12輸出的電流，並藉此調整發光模組nB的亮度。 於習知技藝中，電源轉換器12須包含一振盪器12A，並且 ，處理H 13提供給電轉換器12的控健號通f為一直流電 堅。請參閱圖二(A)。振盪器12A係用以持續產生如圖二(A)所示 5 200832312 ’被標示為VREF·罐即為微處理器 认技ΐ一⑼與圖二(C)分別為提供給發光模組11B的電流和提供 :螢幕ha的資料信號之範例。每當發光模、组im接收到電源ς 因此’電源轉換器12係週期性地將電流提供給發 .f " 。如圖二(A)與圖二(B)所示，只有當該三角波的電壓 時’電源轉換器12才提供電流給發光模、组ΠΒ。於 電愈小，電源轉換器12於固定週期T内提供 電抓的日守間愈長，發光模組11Β的亮度也愈高。 張完料區塊(1C、2C、3〇可能各自包含對應於— 。從時域的角度看，習知技藝中提供給發光模 二1、1B 和提供、給螢幕UA的資料信號是毫不相關的。^ 的查^、止出=ί關係。然而’這樣的狀況會在螢幕iia所呈現 俜：廡f明水波紋的問題。比方說，資料區塊1c的前丰俨 流區塊ib，資料區塊2c的前半段與後半段 【發明内容】 為解決上述問題，本發明提供一 係用工以元=一榮幕及一發光模組，源單ΐ 工徒供錢料⑽蛛繼紐之—㈣錢資g 6 200832312 號與該控制信號同步。 由於該資料信號係由控制單元提供，該 該資料信號的時序(timing)。因此，該控制單Γ制早兀可預先掌握 信號同步之控繼號提供給該電科元=接將與該資料 的電流與該資料信號同步。藉此’根據本=電，元輪出 水波紋的問題。此外’相較於習知技藝，可避免 =包含_產生三角波的紐器，因此可 到進與精神可以藉由以下的發明詳述及所附圖式得 【實施方式】Please refer to FIG. 1. FIG. 1 is a block diagram showing a typical display system. The display system 10 includes a display unit 11, a power converter 12, and a microprocessor 13. The display unit 11 usually includes a screen 11A and a lighting module 11B. For example, if the screen 11A is a liquid crystal screen, the light emitting module 11B can be a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED) module. The X _ power converter 12 is used to supply the current required by the lighting module 11B. Taking the CCFL as an example, the current supplied by the power converter 12 can generate a high voltage across the CCFL, thereby exciting the phosphor powder coated on the CCFL tube wall to generate visible light. As shown in FIG. 1, the microprocessor 13 provides a data signal of the screen 11A. For example, the data signal may contain image data to be displayed on screen 11A. In addition, the microprocessor 13 also provides a control signal for the power converter 12 to control the current output by the power converter 12 and thereby adjust the brightness of the lighting module nB. In the prior art, the power converter 12 must include an oscillator 12A, and the control unit H that the H 13 provides to the power converter 12 is a DC. Please refer to Figure 2 (A). The oscillator 12A is used to continuously generate as shown in FIG. 2(A). 5 200832312 'is labeled as VREF, the canister is the microprocessor (1) and the second (C) is provided to the illumination module 11B. Current and supply: An example of the data signal of the screen ha. Whenever the illumination mode, group im receives the power supply, the power converter 12 periodically supplies current to the .f ". As shown in Fig. 2(A) and Fig. 2(B), only when the voltage of the triangular wave is applied, the power converter 12 supplies current to the light-emitting mode and the group ΠΒ. The smaller the power is, the longer the power converter 12 provides the electric catch during the fixed period T, and the higher the brightness of the light-emitting module 11Β. The finished material blocks (1C, 2C, 3〇 may each contain corresponding to -. From the perspective of the time domain, the data signals provided to the light-emitting modules 2, 1B and provided to the screen UA in the prior art are not Related. ^ Check ^, stop = ί relationship. However, this situation will be presented in the screen iia: 庑 f clear water ripple problem. For example, the data block 1c front Feng torrent block ib The first half and the second half of the data block 2c [Summary of the Invention] In order to solve the above problems, the present invention provides a series of labors with a yuan = a glory screen and a lighting module, source ΐ ΐ ΐ 供 供 ( (10) - (4) Money g 6 200832312 is synchronized with the control signal. Since the data signal is provided by the control unit, the timing of the data signal is timing. Therefore, the control unit can pre-master the signal synchronization. The control number is provided to the electric unit = the current with the data is synchronized with the data signal. By this, according to the present electric, the problem of the water ripple of the yuan wheel. In addition, compared with the conventional skill, it can be avoided = Contains _ to create a triangle wave, so you can get into the spirit With the following detailed description and the accompanying drawings have [Embodiment
A i發日 =供1麵示系統。根據本發明之—較佳具體實施例 為一顯不糸統。請參閱圖三，圖三係繪示該 J 儿3顯示單元31包含一營幕31A及一發光模組3m。電〉ί單 =^係用以提供發光模組31Β 一同步電流。控制單元33提供螢 幕31Α —資料信號，並提供電源單元32用以控制該同步電流之 信號。於實際應財’顯示單元31可為—液晶螢幕，而 1光模組31B可為-冷陰極榮光燈管(CCFL)或—發光二極體模 組0 、 σ請苓閱圖四’圖四(Α)〜(c)係分別繪示根據本發明之控制信 號、同步電流及資料信號的範例。該控制信號包含複數個控制區 塊1A〜3A)，該同步電流包含複數個電流區塊(1B〜3B)，並且該資 料#號，含複數個資料區塊(1C〜3C)。於此範例中，該控制信號 ，一脈寬調變(pulse width modulation，PWM)信號。控制區塊的愈 寬’電流區塊也愈寬，亦即電源單元32提供同步電流的時間愈 長0 7 200832312 〜據ίί㈣’該雜與雜難號目步。糊四所示之 ί二C〜3^ 鬼接1Α〜3Α的前緣(fr〇nt你)各自大致對齊於資料 緣。因此，電流區塊1B〜3B與資料區塊1c〜3c 1 _對關係。藉此’根據本發明之顯示系統30 ΪΪίίίί=題。於實際細巾，鮮電流區塊與資料區塊 對齊方式。請參閱圖五’圖五(Α)〜(C)係分別緣 據^狀蝴錢、電流及資料健㈣—制。於此範 【1工1區塊1A〜3A的後緣(rear e(ige)各自大致對齊於資料區 塊1C〜3C的後緣。 、 此外，控鮮元33係將可直接控制電流區塊之寬度的控制 b虎提供給電源單元32。她於f知技藝，根縣伽之電源單 2 魏含肋產生三肖波的振盪11，因此可降低顯示系統 的硬體成本。 於上述範例中，控制區塊的週期T1與資料區塊的週期丁2相 ^。請參閱圖六，圖六(A)〜(C)係分別繪示根據本發明之控制信 =、電流及資料信號的另一範例。於此範例中，每個資料區塊係 =於不只-健樞塊。糊來說，㈣區塊lc即對應於控 塊1A與2A。於前述兩個範例相同的是，電流區塊1B〜6B ς貧料區塊1C〜3C在時間上仍具有固定的相對關係。若將每兩個 ，制區塊(例如與2Α)視為一組控制區塊，該組控制區塊的週 /月τι亦等於資料區塊的週期Τ2。於實際應用中，控制單元％ 亦可令圖六(Α)中的控制區塊ία的前緣或控制區塊2Α的後緣大 致對齊資料區塊1C的前緣或後緣。 如上所述，根據本發明之顯示系統可避免水波紋的問題。因 此，根據本發明之顯示系統較習知技藝提供更好的顯示的品質。 此外’根據本發明之顯示系統亦可降低顯示系統的硬體成本。 藉由以上較佳具體實施例之詳述，係希望能更加清楚描述本 8 200832312 發明之特徵與精神，而並非以上述所揭露的較佳具體實施例來對 本發明之範疇加以限制。相反地，其目的是希望能涵蓋各種改變 及具相等性的安排於本發明所欲申請之專利範圍的範疇内。 200832312 【圖式簡單說明】 圖一係繪示一典型的顯示系統之方塊圖。 圖二(A)〜(C)為根據習知技藝之振盪器三角波、電流以及資料 信號的時序圖。 圖三係繪示根據本發明之一較佳具體實施例之顯示系統的方 塊圖。 圖四(A)〜(C)、圖五(A)〜(C)、圖六(A)〜(C)為根據本發明之控 制信號、電流以及貧料信號的時序圖。 【主要元件符號說明】 10 :顯示系統 11 :顯示單元 11A :螢幕 11B :發光模組 12 :電源轉換器 12A :振盪器 13 :微處理器 1B〜6B ·電流區塊 1C〜6C :資料區塊 1A〜6A :控制區塊 30 :顯示系統 31 :顯示單元 31A :螢幕 31B :發光模組 32 :電源單元 33 :控制單元A i hair day = for 1 face system. A preferred embodiment in accordance with the present invention is a display system. Referring to FIG. 3, FIG. 3 shows that the J display unit 31 includes a camping screen 31A and a lighting module 3m. The electric ί 单 single = ^ is used to provide a illuminating module 31 Β a synchronous current. The control unit 33 provides a screen 31 - data signal and provides a signal for the power unit 32 to control the synchronous current. In the actual account, the display unit 31 can be a liquid crystal screen, and the 1 light module 31B can be a cold cathode glory light tube (CCFL) or a light emitting diode module 0, σ please refer to Figure 4 'Figure 4 (Α)~(c) are examples of control signals, synchronous currents, and data signals according to the present invention, respectively. The control signal includes a plurality of control blocks 1A to 3A), the synchronization current includes a plurality of current blocks (1B to 3B), and the data # number includes a plurality of data blocks (1C to 3C). In this example, the control signal is a pulse width modulation (PWM) signal. The wider the current block of the control block is, the wider the time is, that is, the longer the power supply unit 32 provides the synchronous current. 0 7 200832312 ~ According to ίί (4) 'The miscellaneous and miscellaneous.糊二C~3^ Ghosts 1Α~3Α The leading edge (fr〇nt you) is roughly aligned with the data edge. Therefore, the current blocks 1B to 3B are related to the data blocks 1c to 3c 1 _. By this, the display system 30 according to the present invention is ΪΪ ί ί 。. In the actual fine towel, the fresh current block is aligned with the data block. Please refer to Figure 5'. Figure 5 (Α)~(C) are based on the shape of the money, current and data (four) - system. The rear edge of the block 1A to 3A of the 1st block 1 is roughly aligned with the trailing edge of the data blocks 1C to 3C. In addition, the control unit 33 can directly control the current block. The width of the control b tiger is supplied to the power supply unit 32. She knows the skill, the root gamma power supply unit 2 Wei rib produces a three-short wave oscillation 11, thus reducing the hardware cost of the display system. The period T1 of the control block is opposite to the period of the data block. Referring to FIG. 6, FIG. 6(A) to (C) respectively show the control signal=, current and data signals according to the present invention. An example. In this example, each data block system = not only the health pivot block. For the paste, the (4) block lc corresponds to the control blocks 1A and 2A. The same as the foregoing two examples, the current region Blocks 1B to 6B have a fixed relative relationship in time. If each of the two blocks (for example, 2Α) is regarded as a group of control blocks, the control block of the group Week/month τι is also equal to the period of the data block Τ 2. In practical applications, the control unit % can also make the control block ία in Figure 6 (Α) Or the trailing edge of the control block 2Α is substantially aligned with the leading or trailing edge of the data block 1C. As described above, the display system according to the present invention can avoid the problem of water ripples. Therefore, the display system according to the present invention is more conventional. Providing a better display quality. Furthermore, the display system according to the present invention can also reduce the hardware cost of the display system. With the detailed description of the above preferred embodiments, it is desirable to more clearly describe the features of the present invention 200832. The scope of the present invention is defined by the spirit of the invention, and is not intended to limit the scope of the present invention. 200832312 [Simplified Schematic] Figure 1 is a block diagram showing a typical display system. Figure 2 (A) ~ (C) is a timing diagram of the triangular wave, current and data signals of the oscillator according to the prior art. Figure 3 is a block diagram showing a display system in accordance with a preferred embodiment of the present invention. Figures 4(A) to (C), Figures 5(A) to (C), and Figure 6(A)~( C) is the root Timing diagram of control signal, current and poor material signal according to the present invention. [Main component symbol description] 10: Display system 11: Display unit 11A: Screen 11B: Light-emitting module 12: Power converter 12A: Oscillator 13: Micro Processors 1B to 6B · Current Blocks 1C to 6C: Data Blocks 1A to 6A: Control Block 30: Display System 31: Display Unit 31A: Screen 31B: Lighting Module 32: Power Supply Unit 33: Control Unit